D-Programming-Language/dmd — pull request #3074 by rainers (2014-01-09 10:20:13+00:00)
Title: no codegen for parts of failed template instantiations

do not write failed template instantiations or parts of these to the object file.

This solves the duplicate COMDAT error in https://github.com/D-Programming-Language/phobos/pull/1411